Bug: "git log --format='format:%+s%+b'" doesn't insert newline before body

> Steps to reproduce:
> $ git init
> $ >123
> $ git add 123
> $ git commit -v -m 'This is subject' -m 'And this is body'
> $ git --no-pager log -1 --format='format:%+s%+b'
> 
> Actual results:
> ```
> 
> This is subject
> And this is body
> ```
> 
> Expected results:
> ```
> 
> This is subject
> 
> And this is body
> ```

> Hi Ilya,
> 
> On Sun, 24 Jul 2016, Ilya Tumaykin wrote:
> > Steps to reproduce:
> > $ git init
> > $ >123
> > $ git add 123
> > $ git commit -v -m 'This is subject' -m 'And this is body'
> > $ git --no-pager log -1 --format='format:%+s%+b'
> > 
> > Actual results:
> > ```
> > 
> > This is subject
> > And this is body
> > ```
> > 
> > Expected results:
> > ```
> > 
> > This is subject
> > 
> > And this is body
> > ```
> 
> The empty line between commit subject and body is neither part of the
> subject nor of the body. That means that the above-mentioned expectation
> was incorrect.

> On Monday 25 July 2016 09:33:00 Johannes Schindelin wrote:
> > 
> > On Sun, 24 Jul 2016, Ilya Tumaykin wrote:
> > [...]
> > > $ git --no-pager log -1 --format='format:%+s%+b'
> > > 
> > > Actual results:
> > > ```
> > > 
> > > This is subject
> > > And this is body
> > > ```
> 
> According to 'git-log' man page '%+b' should insert linefeed "immediately 
> before the expansion if and only if the placeholder expands to a non-empty 
> string." Here "%b" expands to a non-empty string, thus I expect a linefeed 
> before it. Or am I misinterpreting man page somehow?

> > Unless you somehow allow empty commit messages (Git does not, unless
> > you play games with low-level commands), the second '+' is
> > unnecessarily conditional. Therefore "%s%n%+b" *might* do what you
> > intended (I would not know, because that information was missing from
> > the report).
> 
> I want to display '%B', but add colours to '%s'. Thus I have to
> separately include '%s' and '%b', and not just '%B'. I was using
> '%+s%n%+b' with extra colour formatting as a workaround for some time
> now.

> Hi Ilya,
> 
> On Mon, 25 Jul 2016, Ilya Tumaykin wrote:
> > On Monday 25 July 2016 09:33:00 Johannes Schindelin wrote:
> > > On Sun, 24 Jul 2016, Ilya Tumaykin wrote:
> > > [...]
> > > 
> > > > $ git --no-pager log -1 --format='format:%+s%+b'
> > > > 
> > > > Actual results:
> > > > ```
> > > > 
> > > > This is subject
> > > > And this is body
> > > > ```
> > 
> > According to 'git-log' man page '%+b' should insert linefeed "immediately
> > before the expansion if and only if the placeholder expands to a non-empty
> > string." Here "%b" expands to a non-empty string, thus I expect a linefeed
> > before it. Or am I misinterpreting man page somehow?
> 
> The line break is there: after the subject. The misinterpretation is most
> likely the assumption that the new-line "character" is part of the commit
> subject; It is not.